best cocci treatment

My chickens tested positive for cocci. Which treatment does everyone think is the best (at what strength) and how long would the egg withdrawal time be?

It's kind of a relief to know what's going on. I have pullets, 1 1/2 year olds and up. None of them are dying although my older bantam rooster is fairly sick. Cocci does explain the variety of symptoms we have going on. I have 1 1/2-year-old Buff Orpington hens that haven't laid eggs since before the summer heat.

We sell eggs. We have about 40 hens that should lay and are getting anywhere from 14 - 19 eggs per day. My husband is about ready to start killing hens! Uggghhhhh!!!!

I really need something that will work and hopefully quickly (safely). I would like to not have a huge egg withdrawal time if we can help it!